基于匀速扫描黑体的热像仪非均匀性校正  

Non-uniformity correction of thermal imager scanning blackbody with uniform speed

作　　者：崔若璐 侯德鑫[1] 叶树亮[1] CUI Ruo-lu;HOU De-xin;YE Shu-liang(Institute of Industry and Trade Measurement Technique, China Jiliang University, Hangzhou 310018 , China)

机构地区：[1]中国计量大学工业与商贸计量技术研究所,浙江杭州310018

出　　处：《激光与红外》2018年第3期327-332,共6页Laser & Infrared

摘　　要：热像仪非均匀性校正是热像仪应用的一个关键技术,常用的方法为基于黑体的热像仪非均匀性校正方法。多次成像法能解决基于黑体的方法受辐射源非均匀影响的问题,但该方法利用多幅热图的相对关系进行校正,在热图坐标下准确定位较为困难。本文基于多次成像法原理,提出了一种基于匀速扫描黑体的非均匀性校正方法,该方法结合了标定类和配准类基于场景的校正方法的优点,通过热像仪扫描读取黑体参考源,利用热像仪不同探测单元对黑体同一场景点响应的差异进行非均匀性评价。相比多次成像法,本文的方法更容易实现且具有更好的抗噪声能力。利用本文的方法对两个热像仪进行非均匀性校正,结果表明确实可以分离黑体非均匀性,但提高了对黑体辐射源和热像仪时间稳定性的要求。Non-uniformity correction of thermal imager is a key technology for thermal imager applications.The common method is a blackbody-based thermal imager non-uniformity correction method.Multiple imaging method can solve the problem that the blackbody-based method is affected by the non-uniformity of the radiation source,but the method correct the non-uniformity using the relative relationship of multiple thermal im ages,it is difficult to locate accurately in the thermal image coordinates.Based on the principle of multiple imaging m ethod,a non-uniformity correction method of thermal imager scanning blackbody with uniform speed was proposed,which combines the advantages of calibration-based and registration scene-based non-uniformity correction methods.Through scanning blackbody reference source by a thermal im ager,the non-uniformity was evaluated by the difference of the response of different detection units to the same scene of the blackbody.Compared with multiple imaging methods,the method in this paper is easier to achieve and has better anti-noise ability.The non-uniformities of the two thermal imagers were corrected by this method.The results show that the non-uniformity of the blackbody can be separated,but the demands about time stability of the blackbody radiation source and the thermal imager are improved.

关 键 词：红外热像仪 红外焦平面阵列 非均匀性校正 黑体 

分 类 号：TN219[电子电信—物理电子学]